For most, India and South Africa - the T20 World Cup 2024 finalists - remained firm favourites in the buildup to the ongoing edition, given the form and how the two teams lined up. As it turns out, both stand a step away from another final, and South Africa have fared even better, with another dominant run to the semis. They have had the wood over New Zealand - their next opponents - with a 12-7 win-record in the shortest version. A thumping seven-wicket win in Ahmedabad earlier in the competition extended it to a spotless 5-0 in T20 World Cups.

Needless to say, South Africa start favorites again, For all that though, New Zealand too, have enough inspiration to seek from the past. They have faced South Africa twice in ICC tournament semis till date - at the 2015 ODI World Cup and the Champions Trophy last year - and won both. They have, in the last decade, knocked out the heavyweights in the semis too - India at the 2019 ODI World Cup and England in the 2021 T20 World Cup.

It could all come down to finer margins at a venue that has historically produced thrillers in high-stake games. Here's a look at the key aspects that could be decisive on Wednesday.

Firepower at the top

New Zealand and South Africa have gone at 9.61 and 9.54 runs per over in the Powerplay in the tournament so far, the best among the teams that made it to the Super 8s. Their opening pair of Finn Allen and Tim Seifert have averaged 69.2 while going at 10.43, while the corresponding numbers for the Aiden Markram and Quinton de Kock pair are 40.28 and 10.31. There is a catch however in South Africa's case. While Markram has decimated attacks upfront, de Kock has had his struggles against pace and spin alike, and has poor numbers in T20s at the venue, with 85 runs from nine innings at 9.44 while striking at 109. The left-hander has been striking at 124.13 against quicks and 121.21 against spin in the Powerplay in the tournament.

SA openers in Overs 1-6 in T20 WC 2026

Lockie Ferguson, one of the three bowlers to have clocked 150-plus kmph in the competition so far (alongside Anrich Nortje and Jofra Archer), has a good matchup against de Kock, having castled him with a slower-one in Ahmedabad. He has, however, travelled around the park against Markram.

SA openers vs Ferguson in all T20s

Meanwhile, the New Zealand openers have been in scintillating form over the last 12 months in T20s across the globe. Allen has aggregated 1425 runs at 36.53 (SR: 192.56) since March 2025, while Seifert has accumulated 1915 at 35.46 (SR: 154.81). Allen, while he strikes at 165.37 against left-arm pace since January 2024, has had 47 dismissals against the bowling type at an average of 20.93 in the timeframe. He has a negative match-up against Marco Jansen in T20s, and the latter had removed New Zealand's top-three within the Powerplay in the group game.

Finn Allen vs Ngidi and Jansen in all T20s (domestic + internationals)

Seam to play a major role

These two teams have been the most reliant on quicks in the competition so far, barring New Zealand's two games in Sri Lanka which were dictated by the conditions. The India vs West Indies contest on Sunday - the only night game at the Eden Gardens in the tournament - saw just six overs of spin in the second half despite genuine options. The Indian spinners collectively went at 9.37, with Varun Chakaravarthy returning 1/40 from four overs.

Pace vs spin split in the tournament (for teams who made it to Super 8s)

Excluding New Zealand's two matches in Sri Lanka, their percentage of overs to quicks rises to 68.9%.

New Zealand's spin-bowling numbers in the tournament

For quicks, the conventional good-length (6-8 metres) could work once again, especially with the new ball, as was the case on Sunday. In a game that went at 10 runs per over, seamers returned 1/61 off the 51 balls (ER: 7.17) when they pitched it in this zone, 0/18 in 28 balls (ER: 6.86) in the Powerplay across the two innings combined. West Indies' quicks conceded at 7.25 off good length deliveries in the run-chase, and travelled when they went full (ER: 11.06) or short (ER: 9.28).

Matt Henry, should he return in the XI, could be a massive boost for New Zealand. He has gone at just 6.46 in the Powerplay in the tournament so far, and has pitched 45% of his deliveries at length in the phase, returning 2/27 (ER: 4.5) while doing so.

Who finishes it better?

Three of South Africa's five wins against New Zealand in T20 World Cups have come while defending totals (2009, 2010 and 2014) - all courtesy of their brilliance at death - with Dale Steyn being a common differentiator, among others .

While those are a thing of distant past, it could again boil down to this very aspect, given how the two teams have fared in the death overs in the tournament. While they have gone neck to neck across phases while batting, South Africa have had a clear upper hand with the ball, led by Lungi Ngidi's and Corbin Bosch's brilliance. It may also be noted that New Zealand conceded 173/6 and 173/4 against the Associates - UAE and Canada - in the first round. They had allowed Afghanistan to get to 182/6, despite having them 52/2 after eight overs, before being blown away by South Africa in Ahmedabad.

Team wise scoring rates in the tournament (by phases)

Team-wise bowling in the tournament (by phases)

Lungi Ngidi has been the standout bowler for South Africa, especially in the middle-overs and death, with stunning economy rates of 6.33 and 5.6 in the respective phases. He has had an exact even split of balls bowled at under 120-kmph (ER: 5.5) and over (ER: 7.47), thereby keeping the batters guessing.

New Zealand's batters meanwhile, have collectively accumulated 109 off 63 at a strike-rate of 173.01 without any dismissals to balls delivered at under 120 kmph by the quicks, and that builds up for a fascinating contest.

While Jansen and Rabada have gone at over 11 an over at the death, South Africa have stuck to Corbin Bosch, who has bowled the most overs in this phase for them and has gone at a miserly 6.9. Nearly half (41%) of his deliveries have been bowled at 140-plus kmph, which compliments Ngidi's variety from the other end.

Ngidi and Bosch Overs 16-20 in the tournament

Of the 29 bowlers to have bowled at least 5 overs in this phase in the competition so far, these two have the best economy rate, followed by Jasprit Bumrah (7.5).

South Africa hold the aces for finishing touches with the bat too, with the experience of David Miller to go with the belligerence of Dewald Brevis and Tristan Stubbs. Miller has a standout record in ICC tournament knockouts, with 350 runs from six innings at a combined average of 116.66. He had scored 101 after walking in at 24/4 at this very venue in the 2023 World Cup semifinal against Australia. A year earlier, he had scored a match-winning 68*(38) in IPL 2022 Qualifier 1, going 6, 6, 6 off Prasidh Krishna with 16 needed off six. The left-hander has 249 runs at 62.25 (SR: 148.21) from nine T20 innings at the Eden Gardens.

New Zealand's bowlers have collectively gone at 9.94 runs/over in T20Is this year, the worst among full-member teams, which further rises to 10.75 excluding their two Super Eight games in Sri Lanka. Against a power-packed line-up in supreme form, nothing less than a collective effort would suffice.